In the figure at right a magnet is shown. Which surface of the magnet is its^Nor
ID: 1491089 • Letter: I
Question
In the figure at right a magnet is shown. Which surface of the magnet is its^North Pole? (i.e.. Is die North pole the top surface or the bottom surface7) How do you know? A copper ring is placed in a uniform magnetic field B as shown Consider the magnetic farce on the charges in die wire for each of the following cases, and determine if the magnetic force will cause current to flow in die ring. Answer jm or no for each case. Recall: F_m = qvxB. Use the Right Hard Rule to determine die force direction on a positive charge in the ring. Suppose that the ring is now placed in the magnetic field of a solenoid. as shown. Consider die magnetic force on the charges in the ring for each of die following cases, and determine if the magnetic force will cause current to flow in the ring. If you answer yes. determine the direction of current in the ring, and indicate it with a dot or "x" at the top of the image of the ring.Explanation / Answer
1) Top surface is north pole and bottom surface is south pole.
becasue, inside a magnet magnetic field lines are from north pole to south pole.
2)
a) No.Because there is no change in magnetic flux through the loop.
b) No.Because there is no change in magnetic flux through the loop.
c) No.Because there is no change in magnetic flux through the loop.
3)
a) No. Because there is no change in magnetic flux through the loop.
b) yes. Because magnetic flux through the loop increases.
at top point current goes in to the page and at bottom point current comes out of the page.
c) yes. Because magnetic flux through the loop decreases.
at bottom point current goes in to the page and at top point current comes out of the page.